US3368178A - Laminated magnetic core structures - Google Patents

Laminated magnetic core structures Download PDF

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Publication number
US3368178A
US3368178A US571947A US57194766A US3368178A US 3368178 A US3368178 A US 3368178A US 571947 A US571947 A US 571947A US 57194766 A US57194766 A US 57194766A US 3368178 A US3368178 A US 3368178A
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US
United States
Prior art keywords
laminations
layer
joints
magnetic core
laminated magnetic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US571947A
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English (en)
Inventor
Bennett Donald Anthony
Armishaw Ephriam
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
English Electric Co Ltd
Original Assignee
English Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by English Electric Co Ltd filed Critical English Electric Co Ltd
Application granted granted Critical
Publication of US3368178A publication Critical patent/US3368178A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0206—Manufacturing of magnetic cores by mechanical means
    • H01F41/0233—Manufacturing of magnetic circuits made from sheets

Definitions

  • ABSTRACT OF THE DHSCLOSURE This invention is concerned with a laminated magnetic core structure having interleaved butt joints between adjacent portions thereof with passages through the interleaved parts of the joints.
  • the invention provides the passages by the joinder of the end of one lamination having a portion cut out from the end thereof, with the plain straight end of one or more adjacent laminations. Improved and consistently good butt joints between laminations are obtained and the risk of the inadvertent closing of a passage by one or more displaced laminations is eliminated.
  • the present invention relates to magnetic core structures having interleaved joints between adjacent limb portions thereof.
  • a laminated magnetic core structure of the type having interleaved butt joints between adjacent portions thereof, in which at each butt joint in each layer of laminations, one end of one lamination has a cut out portion defining a notch in the said one end of the lamination, the end of each such lamination having a notch therein being disposed adjacent one or more laminations having plain straight ends so that each notch together with the straight end of the or each next adjacent lamination forming the butt joint defines an aperture in each butt joint in the layer, each such aperture in a layer being arranged in alignment with a corresponding aperture in the next adjacent layer so as to provide a passage through the interleaved parts of the joint.
  • the cut away portions are rectangular.
  • the laminations are assembled in the desired number of layers on a jig.
  • FIGS. 1 and 2 show the arrangement of the various laminations in any two adjacent layers of a core structure in accordance with the invention.
  • the single layer of laminations as shown in FIG. 1 comprises three laminations 10, 11 and 12 which in the finished core go to make up the core legs on which the windings are disposed, and four laminations 13, 14, 15 and 16 which go to make up the yoke of the core.
  • the laminations 10, and 12 to 16 have a square portion cut out of the end thereof as shown at 17 to 22 respectively so that when the complete layer of laminations is assembled as shown each cut out portion is closed by the next one or two adjacent laminations to define a square aperture in the layer.
  • 3,368,178 Patented Feb. 6, 19 68 lCC differs from the first layer in that it consists of similar laminations differently disposed.
  • laminations are indicated at 10A to 16A inclusive and the laminations 10A and 12A to 16A have respective cut out portions 23 to 28. As in the case of the layer shown in FIG. 1 each cut out portion is closed by the or each next adjacent lamination in the layer so as to define a square aperture in the layer.
  • a core made up as described above has passages through the overlapping joints between all the limb and yoke portions which go to make up the core and these joints can thus be secured by bolts or the like passing through these passages.
  • the invention can be used in conjunction with conventional methods of clamping joints such, for example, as where the centre limb of a core has overlapping joints with the adjacent portions with a hole centrally in the overlapping part of each such joint whilst the other joints of the core are in accordance with the invention.
  • each cut out portion is rectangular to define a rectangular aperture in the end of a lamination.
  • a laminated magnetic core structure according to claim 1 in which the joints in each alternate layer of laminations are interleaved.
  • a laminated magnetic core structure according to claim 4 in which there are additional interleaved butt joints in the core structure having a passage which passes through the overlapping portions of such joint.
  • a laminated magnetic core of the type having two yoke members, two outer legs, and a middle leg, the legs being joined to the yoke members to form a core having two windows, each yoke member comprising two yoke portions one end of each of which meet with one another and with one end of the middle leg in interleaved butt joints having a passage therethrough, the other end of each yoke member meeting with one end of one of the outer legs in interleaved butt joints also with a passage therethrough, in which, at each butt joint in each layer of laminations there is an aperture, each such aperture in a layer of laminations being arranged in alignment with a corresponding aperture in the next adjacent layer so as to form the passages through the interleaved butt joints, each aperture in a butt joint between an outer leg and a yoke member being formed by the joinder of the ends of one lamination having a cut out portion and a plain uncut end of one abutting lamination, and each aperture

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Clamps And Clips (AREA)
  • Housings And Mounting Of Transformers (AREA)
US571947A 1962-11-14 1966-08-11 Laminated magnetic core structures Expired - Lifetime US3368178A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB43027/62A GB1056595A (en) 1962-11-14 1962-11-14 Improvements in and means for assembling laminated magnetic core structures
GB2672463 1963-07-05

Publications (1)

Publication Number Publication Date
US3368178A true US3368178A (en) 1968-02-06

Family

ID=26258389

Family Applications (1)

Application Number Title Priority Date Filing Date
US571947A Expired - Lifetime US3368178A (en) 1962-11-14 1966-08-11 Laminated magnetic core structures

Country Status (4)

Country Link
US (1) US3368178A (fr)
CH (1) CH404800A (fr)
ES (1) ES293472A1 (fr)
GB (1) GB1056595A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2329935A1 (fr) * 1975-10-28 1977-05-27 Magnavox Co Systeme de telecommande

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1606755A (en) * 1922-04-08 1926-11-16 Western Electric Co Induction coil
US3210708A (en) * 1961-04-14 1965-10-05 Bbc Brown Boveri & Cie Magnetic core having joints of zig-zag configuration with resin clamping means

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1606755A (en) * 1922-04-08 1926-11-16 Western Electric Co Induction coil
US3210708A (en) * 1961-04-14 1965-10-05 Bbc Brown Boveri & Cie Magnetic core having joints of zig-zag configuration with resin clamping means

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2329935A1 (fr) * 1975-10-28 1977-05-27 Magnavox Co Systeme de telecommande

Also Published As

Publication number Publication date
GB1056595A (en) 1967-01-25
ES293472A1 (es) 1964-04-01
CH404800A (fr) 1965-12-31

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